Xu, Qian
Li, Ying
Cheng, Ying
Qu, Yi
Funding for this research was provided by:
National Natural Science Foundation of China (31570789)
Fundamental Research Funds of Shandong University (2014JC015)
Natural Science Foundation of Shandong Province (ZR2013HZ003)
Scientific & Technologic Project of Shandong Province (2014GSF118128)
Article History
Received: 22 September 2017
Accepted: 3 July 2018
First Online: 11 July 2018
Ethics approval and consent to participate
: The study adhered to the tenets of the Declaration of Helsinki and was approved by the Ethics Committee of Qilu Hospital. Written consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.
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